Wireless Bus for Intra-Chip and Inter-Chip Communication, Including Wireless-Enabled Component (WEC) Embodiments

ABSTRACT

Embodiments of the present invention are directed to a wireless-enabled component (WEC) for enabling a wireless bus for intra-chip and inter-chip communication. A WEC encompasses a functional block of an IC (such as, for example, a processing core of a processing unit), an entire IC (such as, for example, a processing unit), or a device that includes a plurality of ICs (such as, for example, a handheld device). According to embodiments, a WEC may be associated with one or more sub-blocks of an IC, a single IC, or a plurality of ICs.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims benefit under 35 U.S.C. §119(e) to U.S.Provisional Application No. 61/298,751 to Behzad et al., entitled“Establishing a Wireless Communications Bus and Applications Thereof,”filed Jan. 27, 2010, the entirety of which is incorporated by referenceherein.

BACKGROUND

1. Field of the Invention

The present invention generally relates to communications amongintegrated circuits (ICs), communications among functional blocks ofsuch ICs, communications among devices that include ICs, andapplications thereof.

2. Background Art

Conventionally, communication between functional blocks of an IC andbetween ICs is accomplished using wired means, including wires, traces,and signal lines, for example. However, as advancement in IC fabricationtechnology today enables ICs with billions of transistors, wiredcommunication presents design challenges for routing signals within anIC and between ICs.

Accordingly, there is a need for improved means of communication betweenfunctional blocks of an IC and between ICs.

BRIEF DESCRIPTION OF THE DRAWINGS/FIGURES

The accompanying drawings, which are incorporated herein and form a partof the specification, illustrate the present invention and, togetherwith the description, further serve to explain the principles of theinvention and to enable a person skilled in the pertinent art to makeand use the invention.

FIG. 1 illustrates an example wireless bus enabled by a plurality ofwireless-enabled components (WECs) according to an embodiment of thepresent invention.

FIGS. 2A-B illustrate example WEC embodiments according to the presentinvention.

FIGS. 3A-B illustrate example wireless power interface embodimentsaccording to the present invention.

FIG. 4 illustrates an example WEC having an internal element that iswirelessly coupled to an outside environment in accordance with anembodiment of the present invention.

FIG. 5 illustrates an example wireless bus enabled by a plurality ofWECs according to an embodiment of the present invention.

FIGS. 6A-C illustrate example WEC embodiments according to the presentinvention.

FIGS. 7A-B illustrate example WEC embodiments according to the presentinvention.

FIG. 8 illustrates an example wireless bus enabled by a plurality ofWECs according to an embodiment of the present invention.

FIG. 9 illustrates an example wireless bus enabled by a plurality ofWECs according to an embodiment of the present invention.

FIG. 10 illustrates an example method for establishing a link betweenWECs according to an embodiment of the present invention.

FIG. 11A illustrates a WEC that sends a request over a control channelaccording to an embodiment of the present invention.

FIG. 11B illustrates a WEC that sends data over a data channel accordingto an embodiment of the present invention.

FIG. 12 illustrates a plurality of WECs configured into afield-programmable communications array according to an embodiment ofthe present invention.

FIG. 13 illustrates an example wireless bus enabled by a plurality ofWECs according to an embodiment of the present invention.

FIG. 14 illustrates an example wireless bus enabled by a plurality ofWECs and adaptable according to expected activity level according to anembodiment of the present invention.

FIG. 15 illustrates an example wireless bus enabled by a plurality ofWECs and adaptable according to expected activity level according to anembodiment of the present invention.

FIG. 16 illustrates an example wireless bus enabled by a plurality ofWECs and adaptable according to desired power consumption or delayaccording to an embodiment of the present invention.

FIG. 17 illustrates an example wireless bus enabled by a plurality ofWECs and adaptable according to expected interference levels accordingto an embodiment of the present invention.

FIG. 18 illustrates a first plurality of WECs and a second plurality ofWECs that communicate over a wireless bus, wherein the first pluralityof WECs comprise processing resources and the second plurality of WECscomprise memory resources, according to an embodiment of the presentinvention.

FIG. 19 illustrates an example wireless bus adapted to enable resourceborrowing among a plurality of WECs according to an embodiment of thepresent invention.

FIG. 20 is a process flowchart of a cost function-based resourceborrowing method according to an embodiment of the present invention.

FIG. 21 illustrates an example wireless bus enabled by a plurality ofWECs located in respective data units of a data center/server accordingto an embodiment of the present invention.

FIG. 22 illustrates an example wireless bus enabled by a plurality ofWECs located in respective data units of a data center/server accordingto an embodiment of the present invention.

FIG. 23 illustrates an example wireless bus enabled by a plurality ofWECs located in respective data units of a data center/server accordingto an embodiment of the present invention.

FIG. 24 illustrates an example wireless bus enabled by a plurality ofWECs located in respective data units of a data center/server accordingto an embodiment of the present invention.

FIG. 25 illustrates an example wireless bus enabled by a plurality ofWECs located in respective data units of a data center/server accordingto an embodiment of the present invention.

FIG. 26 illustrates an example method for creating a system on the flyusing a plurality of WECs according to an embodiment of the presentinvention.

The present invention will be described with reference to theaccompanying drawings. Generally, the drawing in which an element firstappears is typically indicated by the leftmost digit(s) in thecorresponding reference number.

DETAILED DESCRIPTION OF EMBODIMENTS I. Overview

In the detailed description that follows, references to “oneembodiment,” “an embodiment,” “an example embodiment,” etc., indicatethat the embodiment described may include a particular feature,structure, or characteristic, but every embodiment may not necessarilyinclude the particular feature, structure, or characteristic. Moreover,such phrases are not necessarily referring to the same embodiment.Further, when a particular feature, structure, or characteristic isdescribed in connection with an embodiment, it is submitted that it iswithin the knowledge of one skilled in the art to affect such feature,structure, or characteristic in connection with other embodimentswhether or not explicitly described.

Embodiments of the present invention are directed to a wireless-enabledcomponent (WEC) for enabling a wireless bus for intra-chip andinter-chip communication. As used herein, a WEC encompasses a functionalblock of an IC (such as, for example, a processing core of a processingunit), an entire IC (such as, for example, a processing unit), or adevice that includes a plurality of ICs (such as, for example, ahandheld device). According to embodiments, a WEC may be associated withone or more sub-blocks of an IC, a single IC, or a plurality of ICs.

II. Wireless Bus

FIG. 1 illustrates an example wireless bus 100 according to anembodiment of the present invention. As shown in FIG. 1, examplewireless bus 100 is enabled by a plurality of wireless-enabledcomponents (WECs) 112, 114, 116, and 118 and a plurality of wirelesslinks 120, 122, and 124 that connect WECs 112, 114, 116, and 118. WECs112, 114, 116, and 118 each includes wireless data communication means.

Wireless bus 100 enables intra-chip, inter-chip, and inter-devicewireless communication between WECs. For example, communication betweenWEC 112 and WEC 114 via wireless link 120 represents intra-chipcommunication as it takes place within a single IC 106. Communicationbetween WEC 114 and WEC 116 via wireless link 122 represents inter-chipcommunication as it takes place between WECs located in separate ICs 106and 108 but within a same device 102. Communication between WEC 114 andWEC 118 via link 124 represents inter-device communication as it takesplace between WECs located in separate ICs 106 and 110 and in separatedevices 102 and 104.

Wireless bus 100 may be enabled by homogeneous and/or heterogeneous WECsand by homogeneous and/or heterogeneous wireless links. For example,WECs 112, 114, 116, and 118 may have same or different wireless or wiredcommunication capabilities, processing capabilities, poweringmechanisms, functionalities, etc. Further, WECs 112, 114, 116, and 118may be located within same or different type of devices and/or withindevices of same or different device ecosystems. Similarly, wirelesslinks 120, 122, and 124 may be of same or different type as furtherdescribed below.

III. Wireless-Enabled Component (WEC) Embodiments

A WEC is an element for enabling a wireless bus according to embodimentsof the present invention. As used herein, a WEC encompasses a functionalblock of an IC (such as, for example, a processing core of a processingunit), an entire IC (such as, for example, a processing unit), or adevice that includes a plurality of ICs (such as, for example, ahandheld device). According to embodiments, a WEC may be associated withone or more sub-blocks of an IC, a single IC, or a plurality of ICs.Example WECs according to embodiments of the present invention arepresented below. These examples are provided for the purpose ofillustration only and are not limiting of the scope of embodiments ofthe present invention. Further, any variations and/or improvements thatwould be apparent to a person of skill in the art based on the teachingsherein are also within the scope of embodiments of the presentinvention.

FIG. 2A illustrates an example WEC 200A according to an embodiment ofthe present invention. As shown in FIG. 2A, example WEC 200A includes apower interface 202, an AC to DC converter 204, a demodulator 206, acore module 208, a wireless transceiver 210, and an antenna element 218.

Power interface 202 serves to receive and provide power to WEC 200A. Inan embodiment, power interface 202 comprises a direct power attachment,in which there is no power conditioning. In another embodiment, powerinterface 202 receives power in AC form from an external AC powersource. Power interface 202 conveys the received AC power to AC to DCconverter 204.

AC to DC converter 204 converts the AC power received from powerinterface 202 into DC form. In an embodiment, AC to DC converter 204also includes one or more storage elements (not shown) for storing theenergy from the converted DC power. AC to DC converter 204 then powersup the different components of WEC 200A. For example, as shown in FIG.2A, AC to DC converter 204 provides power to demodulator 206, coremodule 208, and wireless transceiver 210 to power them up.

According to embodiments, core module 208 and wireless transceiver 210are configurable in real time upon power up and/or during operation, asdescribed below, for example, with respect to FIG. 12. In an embodiment,as illustrated in FIG. 2A, configuration of core module 208 and wirelesstransceiver 210 is performed via power interface 202 and demodulator206. In particular, the configuration includes the steps of modulating(e.g., amplitude modulating) the power received by power interface 202to convey configuration information; demodulating the received power bydemodulator 206 to generate configuration information; and providing thegenerated configuration information from demodulator 206 to core module208 and wireless transceiver 210. In an embodiment, the generatedconfiguration information includes configuration information 212provided to core module 208 and configuration information 214 providedto wireless transceiver 210.

Alternatively, core module 208 and wireless transceiver 210 arepre-configured at manufacture time. Accordingly, demodulator 206 may beoptional.

Core module 208 represents the functional module of WEC 200A. Forexample, core module 208 may include a microprocessor, microcontroller,digital signal processor, programmable logic circuit, memory,application specific integrated circuit (ASIC), analog to digitalconverter (ADC), digital to analog converter (DAC), digital logiccircuitry, etc.

Wireless transceiver 210 may be any transceiver (i.e., transmitter andreceiver) capable of wireless communication. For example, wirelesstransceiver 210 may be a free-space RF transceiver, a waveguide RFtransceiver, or an optical transceiver, for example. Wirelesstransceiver 210 communicates with core module 208 via an interface 216.In particular, wireless transceiver 210 receives over a wireless bus(such as wireless bus 100, for example) communication destined to coremodule 208, and forwards the received communication to core module 208via interface 216. In addition, wireless transceiver 210 receivescommunication from core module 208 via interface 216, and transmits thecommunication wirelessly over the wireless bus to its intendeddestination. In an embodiment, interface 216 is a wired connection. Inanother embodiment, interface 216 is a proximity coupling, as describedin more detail below with respect to FIG. 4.

Wireless transceiver 210 uses a wireless antenna 218 to wirelesslytransmit and receive communication over the wireless bus. Wirelessantenna 218 may be any wireless antenna, including, for example, anelectromagnetic wave (e.g., RF) antenna or an optical antenna. Theelectromagnetic (EM) wave antenna may be a free-space RF antenna or awaveguide coupler, for example. In addition, as further discussed below,wireless antenna 218 may include one or more antenna structuresconfigurable to enable beamforming and directional communication.

FIG. 2B illustrates another example WEC 200B according to an embodimentof the present invention. Example WEC 200B is substantially similar toexample WEC 200A, described above with reference to FIG. 2A. Inaddition, example WEC 200B uses a wireless power interface 220 for powerinterface 202.

Wireless power interface 220 functions similarly to power interface 202,described above with reference to FIG. 2B. In addition, however,wireless power interface 220 has the ability to receive power wirelesslyfrom an external power source. Accordingly, example WEC 200B requires nowired connections with the outside environment to operate according toits intended functionality. This includes requiring no wiredcommunication interfaces/buses to communicate with the outsideenvironment and no wired power connections/interfaces to receive powerfrom the outside environment.

According to embodiments, wireless power interface 220 may be anyinterface capable of receiving wireless power. For example, as shown inFIG. 3A, wireless power interface 220 may include an inductive coupler302 (e.g., a coil). Alternatively or additionally, wireless powerinterface 220 may include a capacitive coupler 304, as shown in FIG. 3B,for example. These examples are provided for the purpose of illustrationonly and are not limiting of the scope of embodiments of the presentinvention. Further, any variations and/or improvements that would beapparent to a person of skill in the art based on the teachings hereinare also within the scope of embodiments of the present invention.

FIG. 4 illustrates an example WEC having an internal element that iswirelessly coupled to an outside environment in accordance with anembodiment of the present invention. In the example of FIG. 4, the WECis illustrated as a chip enclosed in a package 402. Referring to FIG. 4,included within package 402 is a silicon layer 406 and a signal line404. Silicon layer 406 comprises transistors/logic of the chip. Signalline 404 is configured to route signals between the transistors/logic ofsilicon layer 406 and between silicon layer 406 and an outsideenvironment. To route signals to the outside environment, there is aproximity coupling 412A between signal line 404 and package substrate408, and there is (optionally) a proximity coupling 412B between signalline 404 and a printed circuit board (PCB) 410. Proximity couplings 412may comprise a magnetic coupling (e.g., an inductive coupling), anelectric coupling (e.g., a capacitive coupling), an electromagneticcoupling, and/or a combination thereof By way of proximity coupling 412,the WEC of FIG. 4 may transmit signals to, and receive signals from, anoutside environment (e.g., package substrate 408 and/or PCB), withouthaving an Ohmic contact with the outside environment.

It is to be appreciated that the WEC of FIG. 4 is illustrated as a chipfor illustrative purposes only, and not limitation. As set forth herein,WECs are not limited to chips, but also include functional blocks of achip (such as, for example, a processing core of a processing unit) anddevices that include chips (such as, for example, handheld devices). Anyof these types of WECs may be proximity coupled to an outsideenvironment.

IV. Wireless Links

As mentioned above, a plurality of WECs may be wirelessly coupled into asystem via a wireless communications bus. The wireless communicationsbus comprises a plurality of wireless communications links among theWECs. Described below are (A) example types of links among the WECs and(B) example methods for establishing a link between WECs.

A. Example Types of Links

According to embodiments, links between WECs in a wireless bus can beany type of wireless links, including RF links, optical links, and linksenabled by proximity coupling. Further, a WEC may include one or moretypes of wireless communication means, which may be used to enablesimultaneously one or more types of wireless communication links betweenthe WEC and other WECs.

For illustration, FIG. 5 shows an example wireless bus 500 enabled by aplurality of WECs 502, 504, 506, and 508 according to an embodiment ofthe present invention.

Referring to FIG. 5, WEC 502 and WEC 504 communicate wirelessly viaproximity coupling within wireless bus 500. In an embodiment, WEC 502and 504 communicate by means of near field magnetic induction, wherebycommunication between WEC 502 and WEC 502 is accomplished using alow-power, non-propagating magnetic field. In particular, each of WEC502 and WEC 504 may include a transmitter coil and a receiver coil. Totransmit information, the transmitter coil of the transmitting WEC isused to modulate a magnetic field, which is measured by the receivingcoil at the receiving WEC.

Still referring to FIG. 5, WEC 504 may additionally include means tocommunicate optically, which it uses to communicate with WEC 506. Thus,WEC 504 may communicate simultaneously with both WEC 502 and WEC 506using two different types of wireless communication. In an embodiment,WEC 504 and WEC 506 each includes an optical transceiver to enable theoptical communication link between them. WEC 506 may additionallyinclude RF communication means, which it uses to communicate with WEC508. Thus, WEC 506 may communicate simultaneously with both WEC 504 andWEC 508 using two different types of wireless communication.

By enabling different types of wireless communication links withinwireless bus 500, both the capacity and the reliability of communicationcan be increased and interference can be decreased. The same can also beachieved by using antenna diversity schemes within the wireless bus asfurther discussed below. Antenna diversity schemes, according toembodiments, allow for links to be adapted dynamically according tomultiple dimensions, including, for example, directionality,polarization, and frequency.

In an embodiment, pattern diversity is used within the wireless bus. Inparticular, pattern diversity includes using pattern shaping (e.g.,beamforming and/or adaptive nulling) and/or directional beamtransmission to reduce interference, increase communication rangebetween the WECs, and enable greater directional communication betweenthe WECs. Beamforming is a special case of patterning shaping. Adaptivenulling puts a null of a radiation pattern in the direction of aninterference source, thereby reducing the received level ofinterference.

According to embodiments, to enable RF beamforming, a WEC may includeone or more RF phased arrays, each including a plurality of co-locatedRF antennas. For example, as illustrated by example WEC 602 in FIG. 6A,the WEC may include an electrically steered phased array 604, which canbe controlled electrically to create a desired beamforming pattern in adesired transmission direction. Typically, phased array 604 iscontrolled by means of a plurality of micro phase shifters (not shown inFIG. 6A).

Alternatively or additionally, the WEC may include a mechanicallysteered phased array, such as a MEMS-based phased array 608, asillustrated by example WEC 606 in FIG. 6B.

Further, optical beamforming can be enabled by the WEC using an opticalphased array 704, as illustrated by example WEC 702 in FIG. 7A. Opticalphased array 704 can be electrically steered or mechanically steered.

To enable directional RF beam transmission, a WEC may include one ormore directional RF antennas. Further, according to embodiments, the oneor more directional RF antennas can be steered to provide a greaterrange of RF directional transmission. For example, as illustrated byexample WEC 610 in FIG. 6C, the WEC may include a mechanically steereddirectional antenna 614. The WEC may further include an actuator 612 forsteering directional antenna 614 in a desired transmission direction. Inan embodiment, actuator 612 is MEMS-based.

Similarly, a greater range of optical directional transmission can beenabled by equipping the WEC with one or more mechanically steeredoptical transceivers. For example, as illustrated by example WEC 706 inFIG. 7B, the WEC may include a mechanically steered optical transceiver710, and an actuator 708 for controlling optical transceiver 710. In anembodiment, actuator 708 is MEMS-based.

Polarization diversity is another antenna diversity scheme which can beused within the wireless bus according to embodiments to furtherincrease the wireless bus capacity and reliability and to reduceinterference.

FIG. 8 illustrates an example wireless bus 800 enabled by a plurality ofWECs 802, 804, 806, and 808 according to an embodiment of the presentinvention. As shown in FIG. 8, WECs 802, 804, 806, and 808 includerespective antenna elements 810, 812, 814, and 816.

According to embodiments, polarization diversity is achieved by usingorthogonal polarizations over the links of the wireless bus. Forexample, as shown in FIG. 8, antenna elements 810 and 816 of WECs 802and 808, respectively, are configured to use vertical polarization tocommunicate with each other, while antenna elements 812 and 814 of WECs804 and 806, respectively, are configured to use horizontal polarizationto communicate with each other. Accordingly, communication between WEC802 and WEC 808 and communication between WEC 804 and 806 can take placeconcurrently without causing interference to one another. Further, thecapacity and reliability of wireless bus 800 is increased. Inparticular, in the example of FIG. 8, the capacity of wireless bus 800is doubled by the example polarization diversity scheme as shown.

It is noted that polarization diversity according to embodiments isbased on assigning polarization on a link basis. Thus, the antennaelement of particular WEC may use different polarizations on differentcommunication links. This includes using different polarizations tocommunicate with different WECs and/or using different polarizations tocommunicate with a single WEC (i.e., a first polarization to transmit,and a second polarization to receive).

In embodiments, the polarization diversity scheme used within thewireless bus can be adapted dynamically according to one or more of datatraffic patterns, desired capacity, interference levels, etc. Forexample, referring to FIG. 8, a polarization diversity scheme as shownmay be used when expected data traffic patterns indicate that heavy datatraffic occurs between WEC 802 and WEC 808 and between WEC 804 and WEC806. However, a different polarization diversity scheme may be adoptedwhen data traffic patterns necessitate a change. Similarly, thepolarization diversity scheme shown in FIG. 8 may be adapted dynamicallyfor capacity and/or interference considerations. As a result of theadaptive aspect of polarization diversity, links within the wireless busare configured based on polarization in real-time.

Frequency diversity is another antenna diversity scheme which is enabledaccording to embodiments to increase the wireless bus capacity andreliability and to reduce interference.

FIG. 9 illustrates an example wireless bus 900 enabled by a plurality ofWECs 902, 904, 906, and 908 according to an embodiment of the presentinvention. As shown in FIG. 9, WECs 902, 904, 906, and 908 includerespective antenna elements 910, 912, 914, and 916.

According to embodiments, frequency diversity is achieved by usingdifferent communication frequencies over the links of the wireless bus.For example, as shown in FIG. 9, antenna elements 910 and 916 of WECs902 and 908, respectively are configured to use a first frequency f₁ tocommunicate with each other, while antenna elements 912 and 914 of WECs804 and 806, respectively, are configured to use a second frequency f₂to communicate with each other. Accordingly, communication between WEC902 and WEC 908 and communication between WEC 904 and 906 can take placeconcurrently without causing interference to one another. Further, thecapacity and reliability of wireless bus 900 is increased. Inparticular, in the example of FIG. 9, the capacity of wireless bus 000is doubled by the example frequency diversity scheme as shown.

It is noted that frequency diversity according to embodiments is basedon assigning communication frequencies on a link basis. Thus, theantenna element of a particular WEC may use different communicationfrequencies on different communication links. This includes usingdifferent communication frequencies to communicate with different WECsand/or using different communication frequencies to communicate with asingle WEC (i.e., a first frequency to transmit, and a second frequencyto receive).

Similar to the polarization diversity scheme discussed above, inembodiments, the frequency diversity scheme used within the wireless buscan be adapted dynamically according to one or more of data trafficpatterns, desired capacity, interference levels, etc. As a result, linkswithin the wireless bus are configured based on frequency in real-time.

B. Establishing a Wireless Link

FIG. 10 illustrates an example method 1000 for establishing a wirelesscommunication bus among a plurality of WECs in accordance with anembodiment of the present invention. The WECs may be located on a singlechip, in different chips on a single device, or in different devices. Inmethod 1000, a first channel is used for target acquisition, and asecond channel is used for data communication.

Specifically, referring to FIG. 10, method 1000 begins at a step 1002 inwhich proximally located WECs are identified via a control channel(e.g., a low-speed channel). A proximally located WEC is, for example, aWEC that is within range of another WEC such that the two WECs maywirelessly communicate with each other. In an embodiment, the controlchannel may be implemented using a wireless boundary scan. In anotherembodiment, the control channel may be implemented using the StandardTest Access Port and Boundary-Scan Architecture, commonly referred to asJoint Test Action Group (JTAG).

To identify the proximally located WECs as in step 1002 of FIG. 10, asearch algorithm may be executed. The search algorithm causes a WEC toscan a surrounding area to identify proximally located WECs. Themechanism used to scan the surrounding area may be based on asubstantially omni-directional transmission (such as, for example, alocating beacon), substantially unidirectional transmissions (such as,for example, an electrically steered phased array (FIG. 6A), aMEMS-based phased array (FIG. 6B), a mechanically steered directionalantenna (FIG. 6C), an optical phased array (FIG. 7A), or a mechanicallysteered optical transceiver (FIG. 7B)), and/or a combination ofomni-directional and unidirectional transmissions.

For example, FIG. 11A illustrates a WEC 1102 that transmits a signal1120 to scan a surrounding area for proximally located WECs 1104, 1106,1108, and 1110. In the example of FIG. 11A, WEC 1104 receives a portion1120D of signal 1120; WEC 1106 receives a portion 1120A of signal 1120;WEC 1108 receives a portion 1120B of signal 1120; and WEC 1110 receivesa portion 1120C of signal 1120. As alluded to above, portions 1120A-D ofsignal 1120 may be generated using unidirectional transmissionmechanisms, using omni-directional transmission mechanisms, or acombination thereof. If a substantially unidirectional transmissionmechanism is used, portions 1120A-D of signal 1120 are sequentiallytransmitted using a unidirectional transmission mechanism as disclosedherein. For example, portion 1120A may be transmitted first, thenportion 1120B, then portion 1120C, and then portion 1120D. If, on theother hand, a substantially omni-directional transmission mechanism isused, then portions 1120A-D of signal 1120 are transmitted substantiallysimultaneously, such that portions 1120A-D propagate outward from WEC1102 in an isotropic fashion.

In an embodiment, each WEC 1104, 1106, 1108, and 1110 includes anelement (e.g., an antenna), enabling it to backscatter transmit signal1120. In another embodiment, signal 1120 is simply scattered off of WECs1104, 1106, 1108, and 1110. In a further embodiment, signal 1120 maycomprise a return transmission from WECs 1104, 1106, 1108, and 1110. Inany such embodiment, the backscatter-transmitted, scattered, and/orreturn-transmission signals are subsequently received by WEC 1102,enabling the location of WECs 1104, 1106, 1108, and 1110 (with respectto WEC 1102) to be determined. For example, the locations may bedetermined using techniques of radar and/or sonar and/or anothertechnique.

In an embodiment, WEC 1102 includes a module to determine the locationof proximally located WECs. For example, core module 208 (of FIGS. 2A-B)may be configured to determine the locations of proximally located WECs.In another embodiment, WEC 1102 transmits the subsequently receivedsignals to a controller (such as, a specially configured WEC), enablingthe controller to determine the locations of the proximally located WECsand then transmit these locations back to WEC 1102.

Referring again to FIG. 10, after identifying the proximally located

WECs, communications among the proximally located WECs is supported viaa data channel (e.g., a high-speed channel), as illustrated in a step1004. The transmission protocol used for communication among theproximally located WECs may be based on time division multiple access(TDMA), frequency division multiple access (FDMA), code divisionmultiple access (CDMA), or a combination thereof. Communications overthe data channel use the directional transmission techniques disclosedherein (such as, for example, an electrically steered phased array (FIG.6A), a MEMS-based phased array (FIG. 6B), a mechanically steereddirectional antenna (FIG. 6C), an optical phased array (FIG. 7A), or amechanically steered optical transceiver (FIG. 7B)). In an embodiment,the communication mechanism (e.g., beamforming, optical, etc.) isselected based on the location and capabilities of the proximallylocated WECs.

FIG. 11B illustrates communications via a data channel. In this example,

WEC 1102 sends a communications signal 1130, via the data channel, toproximally located WEC 1106 and sends a communications signal 1132, viathe data channel, to proximally located WEC 1104.

V. Configuring an Array of WECs

With the different types of links between WECs, a plurality ofwirelessly coupled WECs can be configured as a field-programmablecommunications array (“FPCA”) in accordance with an embodiment of thepresent invention. Individual WECs of the FPCA may be configured forspecific functions, and communications among the WECs of the FPCA mayalso be configured. For example, one or more WECs may be configured asprocessing resources of the FPCA, one or more WECs may be configured asmemory resources of the FPCA, and/or one or more WECs may be configuredas repeaters.

FIG. 12 illustrates an example FPCA 1200 in accordance with anembodiment of the present invention. Referring to FIG. 12, FPCA 1200includes a controller 1202 and a plurality of WECs 1204, 1206, 1208, and1210. In an embodiment, controller 1202 is a WEC. Controller 1202 isrespectively coupled to WECs 1204, 1206, 1208, and 1210 via controllinks 1220A, 1220B, 1220C, and 1220D. Control links 1220A-D collectivelycomprise a control channel 1220, enabling controller 1202 to configurethe functionality of FPCA 1200. In this regard, controller 1202 isadapted to configure the functional resource (e.g., core module) of eachWECs 1204, 1206, 1208, and 1210 of FPCA 1200 and to configurecommunications among WEC 1204, 1206, 1208, and 1210.

As an example of the configuration of the core module, controller 1202may configure WEC 1210 as a memory resource of FPCA 1200 and mayconfigure WEC 1208 as a processing resource of FPCA 1200. In accordancewith this example, WEC 1208 may write data to and read data from WEC1210 via a communications link 1232.

As an example of the configuration of communications among the WECs,controller 1202 may configure WEC 1204 as a repeater. In accordance withthis example, WEC 1208 and WEC 1206 may communicate via WEC 1204. Thatis, in accordance with this example, transmissions from WEC 1208 to WEC1206 are first sent from WEC 1208 to WEC 1204 over a communications link1234 and then sent from WEC 1204 to WEC 1206 over a communications link1236. In a similar manner, transmission from WEC 1206 to WEC 1208 arefirst sent from WEC 1206 to WEC 1204 over communications link 1236 andthen sent from WEC 1204 to WEC 1208 over communications link 1234.

It is to be appreciated, however, that the examples presented above arefor illustrative purposes only, and not limitation. A plurality ofwirelessly coupled WECs may be configured into other types of FPCA 1200and/or other types of systems without deviating from the spirit andscope of embodiments of the present invention. Example applications ofsuch FPCAs and/or systems are presented below.

VI. Example Applications

Wirelessly coupled WECs may be configured for many different types ofapplications. Presented below are the following example applications:

-   -   (A) a system with link and route adaptivity;    -   (B) a system that includes scalable links among the WECs;    -   (C) a system that includes co-located resources;    -   (D) a system in which resources are dynamically borrowed;    -   (E) a data center/server system; and    -   (F) a system created on the fly.

It is to be appreciated, however, that these example applications arepresented for illustrative purposes only, and not limitation.Adaptations and modifications of these example applications, as would beapparent to persons skilled in the relevant art(s) based on teachingscontained herein, are contemplated within the spirit and scope ofembodiments of the present invention.

A. Link and Route Adaptivity

FIG. 13 illustrates an example wireless bus 1300 enabled by a pluralityof WECs 1302, 1306, 1306, and 1308 according to an embodiment of thepresent invention.

According to embodiments, links and/or routes among WECs 1302, 1306,1306, and 1308 may be adapted based on various factors. For example, thelinks between WEC 1302 and 1306 may be adapted according to one or moreof, among other factors, the relative position of WECs 1302 and 1306,available capabilities (e.g., communication capabilities) at WECs 1302and 1306, availability of resources at WECs 1302 and 1306, and thephysical environment.

For example, the relative position of WECs 1302 and 1306 may be a factorin determining the type of links between WECs 1302 and 1306 (e.g., RF,optical, proximity coupling). Thus, in embodiments, if the relativeposition of WECs 1302 and 1306 changes, the links between WECs 1302 and1306 may be adapted accordingly to ensure reliable communication. Forexample, the links between WECs 1302 and 1306 may be adapted fromoptical to RF if changes in the relative position of WECs 1302 and 1306cause a loss of line-of-sight between WECs 1302 and 1306. Similarly, thephysical environment may cause the links between WECs 1302 and 1306 tobe adapted from one type to another.

Similarly, available capabilities (e.g., communication capabilities) atWECs 1302 and 1306 govern the type of links that can be created betweenWECs 1302 and 1306, as well as the range of adaptability of the links.For example, the type of antenna elements as well as the configurabilityof the antenna elements (e.g., directionality, polarization, frequency)available at WECs 1302 and 1306 may determine whether and/or how WECs1302 and 1306 may communicate. For example, WEC 1302 may include amechanically steered RF directional antenna such as antenna 614 shown inFIG. 6C, and a one-directional optical transceiver, as a result of whichonly RF communication can be supported between WEC 1302 and WEC 1306.However, in another example, WEC 1302 may include a mechanically steeredoptical transceiver such as optical transceiver 710 shown in FIG. 7B, asa result of which both RF and optical communication may be supportedbetween WEC 1302 and WEC 1302, and the links between WEC 1302 and 1306may be adapted as either RF or optical, or both.

The availability of resources at WECs 1302 and 1306 may also be used inadapting the links between WECs 1302 and 1306. For example, assumingthat WECs 1302 and 1306 may communicate either using RF or opticalcommunication and that WEC 1306 communicates using RF with WEC 1304,then the links between WEC 1302 and 1306 may be adapted for opticalcommunication because the RF transceiver at WEC 1306 may not beavailable or capable of supporting concurrent RF communication with bothWECs 1302 and 1304.

In addition to the ability to adapt links between WECs, communicationroutes among WECs may be adapted according to embodiments of the presentinvention. For example, referring to FIG. 13, communication routesbetween WECs 1302 and 1304 may be adapted according to one or more ofthe relative position of WECs 1302 and 1304, available capabilities(e.g., communication capabilities) at WECs 1302 and 1304 as well as atWECs along the routes, availability of resources at WECs 1302 and 1304and at WECs along the routes, and the physical environment.

The relative position of WECs 1302 and 1304 and the physical environmentmay determine route selection between WECs 1302 and 1304, including, forexample, the availability of direct (i.e., single hop) communicationversus multi-hop communication. For example, referring to FIG. 13, thepresence of a communication barrier (e.g., physical barrier) between WEC1302 and WEC 1304 may prohibit direct communication between the two WECsand require a multi-hop communication route to be used (via either WEC1306 or WEC 1308). However, if the relative position of WECs 1302 and1304 and/or the physical environment change, the communication routesbetween WEC 1302 and 1304 may be adapted accordingly to ensure optimalcommunication. For example, the route between WECs 1302 and 1304 may beadapted from multi-hop to single hop if the physical barrier is nolonger present.

Similarly, available capabilities (e.g., communication capabilities)and/or resources (e.g., energy, processing power, etc.) at WECs 1302 and1304 as well as at WECs 1306 and 1308 may be a factor in routeselection. For example, antenna elements at WEC 1302 may not support thecommunication range required to communicate directly with WEC 1304.Thus, WEC 1302 may opt to communicate via WEC 1306 or WEC 1308 if eitheris within communication range. In another example, processing loads atWECs 1306 and 1308 determine which WEC is used to establish a multi-hoproute from WEC 1302 to WEC 1304.

As would be understood by a person skilled in the art based on theteachings herein, embodiments of the present invention are not limitedto the examples described above. For example, a person of skill in theart would appreciate that other factors may be used to adapt linksand/or routes among WECs. While these other factors are not explicitlymentioned above, they are apparent to a person of skill in the art basedon the teachings herein and are within the scope of embodiments of thepresent invention.

B. Scalable Wireless Bus

WECs may be used in accordance with the features described herein toenable a scalable wireless bus. In an embodiment, the scalable wirelessbus may have at least one of the number of links among WECs and thecapacity of said links adapted based on one or more factors. Forexample, the number of links and the capacity of the links may beadapted according to one or more of, among other factors, expectedactivity level over the wireless bus, desired power consumption, delay,and interference levels. Examples illustrating a scalable wireless busaccording to an embodiment are provided in FIGS. 14-17. These examplesare provided for the purpose of illustration only and are not limitingof the scope of embodiments of the present invention. Further, anyvariations and/or improvements that would be apparent to a person ofskill in the art based on the teachings herein are also within the scopeof embodiments of the present invention.

FIG. 14 illustrates an example wireless bus 1400 enabled by a pluralityof WECs 1402, 1404, 1406, and 1408 and a plurality of wireless linksconnecting the WECs. In an embodiment, wireless bus 1400 is adaptableaccording to expected activity level over the wireless bus. Inparticular, wireless bus 1400 can be adapted to increase/decrease thenumber of links that connect WECs 1402, 1404, 1406, and 1408 accordingto expected activity level. For example, as shown in FIG. 14, at lowactivity level, only three links 1410, 1412, and 1414 may be establishedto enable communication over wireless bus 1400. At high activity level,however, two additional links 1416 and 1418 are established toaccommodate the increased activity. Additionally or alternatively,wireless bus 1400 can be adapted to increase/decrease the capacity ofeach link according to expected activity level. Link capacity can beincreased/decreased by varying one or more of, among other factors,transmit power, modulation scheme, and error coding.

FIG. 15 illustrates another example wireless bus 1500. In an embodiment,wireless bus 1500 is adaptable to increase/decrease the number of linksamong WECs 1402, 1404, 1406, and 1048 according to expected activitylevel over the wireless bus. In particular, the number of links betweenany two WECs is increased at high activity level using polarizationdiversity. For example, as shown in FIG. 15, for each existing link1410, 1412, and 1414 at low activity level, a respective link 1502,1504, and 1506 is established at high activity level, such that theexisting link and the added link use orthogonal polarizations.Additionally or alternatively, wireless bus 1500 can be adapted toincrease/decrease the capacity of each link according to expectedactivity level. Link capacity can be increased/decreased by varying oneor more of, among other factors, transmit power, modulation scheme, anderror coding.

FIG. 16 illustrates an example wireless bus 1600 enabled by a pluralityof WECs 1602, 1604, 1606 and 1608. In an embodiment, wireless bus 1600is adaptable according to desired power consumption and/or delay. Forexample, as shown in FIG. 16, when lower power consumption is desiredand/or higher delay can be accommodated, wireless bus 1600 may beadapted to have more shorter range communication links, such as links1610, 1612, and 1614, and multi-hop routes. In contrast, when lowerdelay is desired and/or when higher power consumption can beaccommodated, wireless bus 1600 can be adapted to utilize more longerrange communication links, such as communication link 1616, and singlehop routes.

FIG. 17 illustrates an example wireless bus 1700 enabled by a pluralityof WECs 1702, 1704, 1706, and 1708. In an embodiment, wireless bus 1700is adaptable according to expected/desired interference levels. Forexample, as shown in FIG. 17, when higher interference is acceptableand/or when expected interference is low (based on expected traffic),wireless bus 1700 can be adapted to include wireless links 1710, 1712,1714, and 1716. Further, links 1714 and 1716 may be of same polarization(or frequency), for example. On the other hand, when lower interferenceis desired and/or when expected interference is high (based on expectedtraffic), wireless bus 1700 can be adapted to include links 1710, 1712,and 1714 only, in order to reduce interference. In particular, in theexample of FIG. 17, interference due to links 1714 and 1716 is reduced.Alternatively, wireless bus 1700 may include link 1716, adapted howeverto use a different polarization (or frequency) than link 174. Thus, nointerference due to links 1714 and 1716 may occur.

C. Co-Location of Resources

In an embodiment, wirelessly enabled functional units of a first type(e.g., processing resources) are spatially separated from wirelesslyenabled functional units of a second type (e.g., memory resources), butwirelessly coupled to each other via a wireless communications bus.

For example, FIG. 18 illustrates a system that includes a plurality ofprocessing resources 1800 and a plurality of memory resources 1850.Processing resources 1800 and memory resources 1850 are spatiallyseparated, but wirelessly coupled via a wireless communications bus1860. Processing resources 1800 may be included in one or more stacks,in one or more devices, on one or more printed circuit boards, or inanother form factor that enables processing resources 1800 to beco-located. Similarly, memory resources 1850 may be included in one ormore stacks, in one or more devices, on one or more printed circuitboards, or in another form factor that enables memory resources 1850 tobe co-located.

Referring to FIG. 18, processing resources 1800 include a plurality ofWECs 1802A-1802N, wherein each WEC 1802A-1802N respectively includes acorresponding processing module 1804A-1804N. Similarly, memory resources1850 include a plurality of WECs 1852A-1852N, wherein each WEC1852A-1852N respectively includes a corresponding memory module1854A-1854N.

In the system of FIG. 18, memory is dynamically allocated to aprocessing module 1804 by dynamically associated one or more memorymodules 1854 with the processing module 1804 via wireless communicationsbus 1860.

D. Resource Borrowing

WECs may be used in accordance with the features described herein toenable a wireless resource borrowing environment. In particular, awireless bus to connect a plurality of WECs is first established asdescribed above, and then the wireless bus is used to enable theplurality of WECs to share and/or borrow resources among each others.

For example, FIG. 19 illustrates an example wireless bus 1900 adapted toenable resource borrowing among a plurality of WECs 1902, 1904, and 1906according to an embodiment of the present invention. In an embodiment,example wireless bus 1900 is established on the fly, as furtherdescribed below in Section VI.F. Wireless bus 1900 is established, forexample, by establishing wireless links 1912 and 1914. Other wirelesslinks among WECs 1902, 1904, and 1906 may also be established.

In an embodiment, WECs use the established wireless bus to shareresource information (including resource availability information) amongeach others. For example, a WEC may share with other WECs informationregarding its processing resources (e.g., DSP, FPGA, ASIC, analog, etc.)and memory resources (e.g., read-only, RAM, NVRAM, etc.). The WEC maythen use the shared resource information to identify resources at otherWECs that it may borrow to perform certain tasks. Alternatively oradditionally, WECs may use a server, as further described below inSection VI.F, to download resource information.

For example, referring to FIG. 19, to aid it in performing a particulartask, WEC 1902 may identify as available for borrowing a processingmodule 1908 at WEC 1904 and a memory module 1910 at WEC 1906. WEC 1902may then use wireless links 1912 and 1914 to borrow processing module1908 and memory module 1910, respectively.

In an embodiment, WEC 1902 sends borrowing requests to WECs 1904 and1906 to borrow processing module 1908 and memory module 1910,respectively. In response, WEC 1902 receives borrowing permissions fromWECs 1904 and 1906, respectively, if processing module 1908 and memorymodule 1910 are available. In an embodiment, a borrowing permissionincludes an allotted usage time for using the resource. WEC 1902 canthen use processing module 1908 and memory module 1910 via links 1912and 1914, respectively, as if the two modules actually belonged thereto.

WEC 1902 may use processing module 1908 and memory module 1910 accordingto the allotted usage times specified in their respective borrowingpermissions. When WEC 1902 is done using a resource and/or when theallotted usage time for the resource expires, WEC 1902 releases theresource back to its owner WEC.

In an embodiment, resource borrowing in a wireless WEC environment isperformed according to a cost-based method which optimizes resourceborrowing according to a cost function. The cost function may bedesigned to optimize resource borrowing according to any combination ofone or more factors, including power consumption, processing speed,delay, interference, error rate, reliability, load at the lender WEC,computing capability at the lender WEC, etc.

FIG. 20 is a process flowchart 2000 of an example cost function-basedresource borrowing method according to an embodiment of the presentinvention. In an embodiment, process 2000 is performed at a WEC in orderto borrow a desired resource from neighboring WECs in a wireless WECenvironment. In another embodiment, process 2000 is performed at acontroller based on a request from the WEC.

Process 2000 begins in step 2002, which includes determining a desiredresource. In an embodiment, the desired resource is a resource needed toperform a particular task at the WEC. The desired resource may be aprocessing resource or a memory resource, for example. In an embodiment,determining a desired resource includes determining a type of thedesired resource, properties of the desired resource (e.g., size, speed,etc.), and a required usage time of the resource (e.g., when, for howlong, etc.).

Step 2004 includes identifying one or more neighboring WECs of the WECthat have the desired resource. In an embodiment, neighboring WECsinclude WECs which are a single hop away from the WEC (i.e., WECs withwhich direct communication can be performed reliably). In anotherembodiment, neighboring WECs include all WECs that are withincommunication reach of the WEC (regardless of the number of hops neededfor communication). In an embodiment, step 2004 includes processingresource information obtained from neighboring WECs and/or from a serverto determine neighboring WECs having the desired resource available forthe required usage time.

Step 2006 includes calculating, for each of the identified one or moreneighboring WECs, a cost function associated with borrowing the desiredresource from the neighboring WEC. In an embodiment, the cost functionis a function of any combination of one or more factors, including powerconsumption, processing speed, delay, interference, error rate,reliability, load at the lender WEC, computing capability at the lenderWEC, etc.

Finally, step 2008 includes selecting a WEC from among the identifiedneighboring WECs having the minimum cost function from among thecalculated cost functions in step 2006; and borrowing the desiredresource from the selected WEC.

As noted above, process flowchart 2000 illustrates an example cost-basedresource borrowing method according to embodiments of the presentinvention. This example is provided for the purpose of illustration onlyand is not limiting of the scope of embodiments of the presentinvention. Further, any variations and/or improvements that would beapparent to a person of skill in the art based on the teachings hereinare also within the scope of embodiments of the present invention. Forexample, process 2000 may be modified to enable cost-based resourceborrowing of a plurality of resources from one or more neighboring WECs.As such, the cost function optimizes resource borrowing with respect toborrowing more than one resource at the same time from one or more WECs.

E. Wire-Free Data Center/Server

WECs may be used in accordance with the features described herein toenable various applications in the data center/server context. Inparticular, a wire-free data center/server is described below. The datacenter/server is wire-free in the sense that communication within a dataunit of the data center/server (i.e., intra-data unit), between dataunits of the data center/server (inter-data unit), and between the dataunits and the backplane of the data center/server is performedwirelessly.

FIG. 21 illustrates an example wireless bus 2100 enabled by a pluralityof WECs 2108-2124 located in respective data units 2102, 2104, and 2106of a data center/server according to an embodiment of the presentinvention. Communication between the various WECs 2108-2124 is performedwirelessly and in accordance with the various wireless communicationtypes and methods described above. In an embodiment, each data unitincludes one or more WECs with the ability to wirelessly communicatewith WECs located on other data units. As such, wireless communicationbetween the various data units is enabled. For example, as shown in FIG.21, WECs 2108, 2112, 2116, 2118, and 2120 establish wireless links 2126,2128, and 2130, which enable communication between any two of data units2102, 2104, and 2106.

Low communication delay between data units in a data center/server isdesired. Accordingly, in an embodiment, multiple links and/or routes areestablished among the data units to decrease delay and reduce thepossibility of bottlenecks in the wireless bus. For example, as shown inFIG. 22, example wireless bus 2200 includes two routes between dataunits 2102 and 2106 so that communication traffic can be split ontoseparate routes (2126, 2130; and 2202, 2204) via WECs 2114 and 2116 ofdata unit 2104. In an embodiment, as discussed above, example wirelessbus 2200 can be adapted according to expected traffic, for example, toestablish one or both of the routes.

Similarly, low interference is desired in a data center/server.Accordingly, in an embodiment, spatial diversity is be used to spatiallyseparate as much as possible wireless links established between dataunits. For example, as shown in FIG. 23, example wireless bus 2300includes two wireless links 2202 and 2302 that are established with amaximum possible spatial separation in order to reduce interference.

In another embodiment, frequency and/or polarization diversity are usedto minimize interference and/or increase communication capacity of thewireless bus. For example, as shown in FIG. 24, example wireless bus2400 includes two wireless routes (2126, 2130; and 2202, 2204) thatenable communication among data units 2102, 2104, and 2106. Further, theroutes are established such that links 2126 and 2202 are RF links withfrequency diversity, and links 2130 and 2204 are optical link withpolarization diversity. As such, communication over both routes canoccur concurrently with minimal or no interference. Further, nointerference occurs at intermediate WECs 2114 and 2116.

In addition to intra-data unit and inter-data unit wirelesscommunication, in an embodiment, communication between data units andthe backplane of the data center/server is performed wirelessly. Forexample, as shown in FIG. 25, example wireless bus 2500 additionallyincludes wireless links 2510 and 2512 established respectively betweenWEC 2110 of data unit 2102 and WEC 2504 of the backplane 2502 andbetween WEC 2124 of data unit 2106 and WEC 2508 of the backplane 2502.In an embodiment, each data unit includes at least one WEC capable ofwirelessly communicating directly with the backplane.

F. Creation of a System on the Fly

In an embodiment, WECs are dynamically coupled into a system on the fly.The system may include one or more WECs that function as processingresources and one or more other WECs that function as memory resources,in a similar manner to that described above with respect to FIG. 18. Inaddition, WECs may be dynamically added to the system (as they come intocommunications range of the system), and WECs may be dynamically droppedfrom the system (as they move out of communications range of thesystem). A WEC may be configured to store information about past linkswith other WECs, especially if a problem occurred with a previous link.To support the fluidity of such a system, WECs are configured to scantheir respective environments for a server (which may be a WEC), uploadtheir respective resource availabilities to the server, and thendownload appropriate linking capabilities from the server.

For example, FIG. 26 illustrates an example method 2600 for creating asystem on the fly in accordance with an embodiment of the presentinvention. Referring to FIG. 26, method 2600 begins at a step 2602 inwhich a WEC searches for WECs and/or a server. In an embodiment, the WECsearches for all proximally located WECs. In another embodiment, the WECsearches for only WECs that are part of a single ecosystem (e.g., WECsfrom a single provider).

The server of method 2600 may be a WEC, and the WEC designated as theserver may change over time. For example, a first WEC may be designatedas a server of the system on the fly during a first period of time, anda second WEC may be designated as a server of the system on the flyduring a second period of time. Additionally or alternatively, there maybe more than one server for the system. For example, a first servercould accommodate all WECs included in a first device or all WECsincluded in a first region of space, and a second server couldaccommodate all WECs included in a second device or all WECs included ina second region of space.

The search of step 2602 may be performed (substantially) continually, atpredefined time intervals, at the occurrence of a qualifying event(e.g., start up), and/or at another time. This search may be based onany of the search techniques disclosed herein—including, but not limitedto, a search based on an electrically steered phased array (FIG. 6A), aMEMS-based phased array (FIG. 6B), a mechanically steered directionalantenna (FIG. 6C), an optical phased array (FIG. 7A), a mechanicallysteered optical transceiver (FIG. 7B), or a locating beacon. (See, e.g.,Section B, supra.)

In step 2604, the WEC uploads its resource capabilities to the server.For example, the WEC may upload the amount of memory and/or the amountof processing power it has available. The WEC may also upload additionalinformation—such as, for example, its location, what resources it islooking to couple with, a type of communication protocol, a securitycode, or other information that may be used to couple the WEC withanother WEC.

In step 2608, the WEC downloads a linking resource (e.g., control logic)from the server. The linking resource enables the WEC to link to otherWECs of the system on the fly. For example, the linking resource may:(i) identify WECs included in the system on the fly; (ii) identify WECsto link to; (iii) define the type of link between the WEC and other WECs(see, e.g., Section IV.A, supra); (iv) configure the functional resourceof the WEC and/or the type of wireless communication between the WEC andother WECs (see, e.g., Section V, infra.); (v) update program codeand/or an operating system of the WEC; and/or (vi) provide otherinformation and/or functionality to enable a WEC to link to other WECincluded in the system on the fly. After downloading the linkingresource, the WEC is configured to link to one or more other WECs inaccordance with the linking resource.

VII. Conclusion

Various aspects of embodiments of the present invention can beimplemented using software, firmware, hardware, or a combination thereofFor example, the representative signal-processing functions describedherein (e.g. transmission of wireless signals, reception of wirelesssignals, processing of wireless signals, etc.) can be implemented inhardware, software, or a combination thereof For instance, thesignal-processing functions can be implemented using general-purposeprocessors (e.g., CPUs), logic (e.g., computer logic),application-specific integrated circuits (ASIC), digital signalprocessors, etc., as will be understood by those skilled in the artsbased on the discussion given herein. Accordingly, any processor thatperforms the signal-processing functions described herein is within thescope and spirit of the present invention.

Further, the signal-processing functions described herein could beembodied by program instructions that are executed by a processor or anyone of the hardware devices listed above. The program instructions causethe processor to perform the signal-processing functions describedherein. The program instructions (e.g. software) can be stored in acomputer-readable storage medium, computer-program medium, or anystorage medium that can be accessed by a computer or processor. Suchmedia include a memory device such as a RAM or ROM, or other type ofdata storage medium such as a computer disk or CD ROM, or theequivalent. Accordingly, any data storage medium having program codethat cause a processor to perform the signal-processing functionsdescribed herein are within the scope and spirit of the presentinvention.

Embodiments of the present invention can work with software, hardware,and/or operating system implementations other than those describedherein. Any software, hardware, and operating system implementationssuitable for performing the functions described herein can be used.

Embodiments have been described above with the aid of functionalbuilding blocks illustrating the implementation of specified functionsand relationships thereof. The boundaries of these functional buildingblocks have been arbitrarily defined herein for the convenience of thedescription. Alternate boundaries can be defined so long as thespecified functions and relationships thereof are appropriatelyperformed.

The foregoing description of the specific embodiments will so fullyreveal the general nature of the invention that others can, by applyingknowledge within the skill of the art, readily modify and/or adapt forvarious applications such specific embodiments, without undueexperimentation, without departing from the general concept of thepresent invention. Therefore, such adaptations and modifications areintended to be within the meaning and range of equivalents of thedisclosed embodiments, based on the teaching and guidance presentedherein. It is to be understood that the phraseology or terminologyherein is for the purpose of description and not of limitation, suchthat the terminology or phraseology of the present specification is tobe interpreted by the skilled artisan in light of the teachings andguidance.

The breadth and scope of embodiments of the present invention should notbe limited by any of the above-described exemplary embodiments, butshould be defined only in accordance with the following claims and theirequivalents.

1. A wireless-enabled component (WEC), comprising: a core module thatperforms one or more functions of the WEC; a wireless transceiver,coupled via an interface to the core module, that allows the core moduleto communicate wirelessly over a wireless bus; and a power interfacethat receives power from an external source and that provides power tothe core module and the wireless transceiver.
 2. The WEC of claim 1,wherein the core module comprises one or more of a microprocessor, amicrocontroller, a digital signal processor, a programmable logiccircuit, memory, an application specific integrated circuit (ASIC), ananalog to digital to converter (ADC), a digital to analog converter(DAC), and digital logic circuitry.
 3. The WEC of claim 1, wherein thewireless transceiver includes one or more of a free-space RFtransceiver, a waveguide RF transceiver, and an optical transceiver. 4.The WEC of claim 1, wherein the interface includes a wired connection.5. The WEC of claim 1, wherein the interface includes a proximitycoupling.
 6. The WEC of claim 5, wherein the proximity coupling is aninductive coupling or a capacitive coupling.
 7. The WEC of claim 1,wherein the power interface includes a wireless power interface thatreceives power wirelessly from the external source.
 8. The WEC of claim7, wherein the power interface includes one or more of an inductivecoupler and a capacitive coupler.
 9. The WEC of claim 8, wherein thepower interface includes a coil.
 10. The WEC of claim 1, furthercomprising: a demodulator, coupled to the power interface, thatdemodulates the power received by the power interface to generateconfiguration information, and that provides the generated configurationinformation to the wireless transceiver or the core module.
 11. The WECof claim 10, wherein the power received by the power interface isamplitude modulated to convey the configuration information.
 12. The WECof claim 1, further comprising: an AC to DC converter, coupled to thepower interface, that converts the power received by the power interfacefrom AC to DC, and that provides DC power to the core module and thewireless transceiver.
 13. The WEC of claim 1, further comprising: awireless antenna, coupled to the wireless transceiver, that wirelesslytransmits and receives communication over the wireless bus.
 14. The WECof claim 13, wherein the wireless antenna includes one or more of anelectromagnetic wave antenna and an optical antenna.
 15. The WEC ofclaim 14, wherein the wireless antenna includes one or more of afree-space RF antenna and a waveguide coupler.
 16. The WEC of claim 13,wherein the wireless antenna is configurable to enable beamforming anddirectional communication.
 17. The WEC of claim 1, wherein the coremodule and the wireless transceiver are configurable in real time uponpower up.
 18. The WEC of claim 1, wherein the core module and thewireless transceiver are pre-configured at manufacture time.
 19. The WECof claim 1, wherein the core module includes one or more blocks of anintegrated circuit (IC).
 20. The WEC of claim 1, wherein the core moduleincludes a single integrated circuit (IC).
 21. The WEC of claim 1,wherein the core module includes a plurality of integrated circuits(ICs).